Locomotive boiler



Patented Apr. 2l, 1925.

UNITED srixxr-lss;v

PATENT orifice. f

CHARLES GILBERT HAWLEY,` QF CHICAGO, ILLINOIS, ASSIGNOR TO LOCOMOTIVEFIR BOX COMPANY, 0F CHvlCALrO,v ILLINOIS, A CORPORATION OF DELAWARE.

LOCOMOTIVE BOILER.

Application flled May 13,

` andsteaming attachments to and within the rebox of the boiler, therebyadding greatly to the heating surfaces of the firebox and bringing abouta rapid circulation of the water throughout the boiler, whereby all ofthe heating surfaces of the boiler are increased in efficiency. n .i

The particular obj ect of the invention is to` provide`water-circulating elements or at-y tachments which may be readilyplaced in ireboxes of ordinary design, and which, in themselves shall beof simple and inexpensive form.

- My invention will be readily understood on reference to theaccompanying drawings, in which Fig. l isa vertical longitudinal sectionof a locomotive irebox embodying" my invention; Fig. 2 is a crosssection thereof; Fig. 3 is like yunto Fig. l, but illustrates awater'heating-and-circulating attachment of a more restricted form; Fig.4 is a cross section taken from Fig. 3'; Fig. 5 is a plan viewv takenfrom Fig. 3; Figs. 6, 7, 8 and 9 are detailed views of one of theattachments,

the better to disclose the construction thereof.

I have herein shown locomotive ireboxesy of both plain (Fig. 3) andcombustion chamber (Fig. l) types. The parts 2 and 3 will be recognizedas respectively the crown sheet and the throat sheet of the lirebox.Briefly, I provide the throat sheet with a horizontal slot or opening 4and the crown sheet with a longitudinal slot or opening 5.l By prefer*lence two pairs of openings are formed in the sheet, as represented inFigs. 2, 4 and 5. For each pair of openings, which obviously are atright angles to one another. I provide a water-steaming-and-circulatingelement in` the form of a hollow stay-bolted water wall. The water wallsofv Figs. l and 2 are marked A. Those of Figs. 3, 4 and r5 are marked B.

192:2. y serial No. 5so,ee2. y

They differ only in shape, the wall A beingl the Wider at the top andVpresentinga longer outlet opening or slot 5 in the crown sheet.

Each of these members'or hollow walls com` prises ytwo sheets of metalpreferably. of the same kind and thickness as the crown and side sheetsof the firebox. These two sheets are warped o1" twisted (by any suitablemeans) into substantially the shapes herein depicted. Their edges arethen ianged together as well shown in Figs. 7 and 9. The

'flanged edges are united by welds 6, leaving only the upper and lowerends of the wall open. The spaced-apart sheets are joined by closelyspaced stay-bolts 7, as they must withstand the internal pressure of theboiler. By lpreference the upper and lower ends of leach member areflanged outward as shown in Fig. 9 in order that they may be welded i torespective sheets 2 and 3. By preference the flanges 8 are made wideenough to receive certain of the stay-bolts9 and 10, so that ythe membermay be spoken of as finding support from the shell of the boiler. s y

The heating surface thus added to the lirebox is of the utmostimportance and as will be obvious the rapid heating and evaporation ofwater within these members `brings about a vigorous fore-and-aftcirculation of water in the boiler. An important result consists in theconstant flooding of the crown sheet of the irebox with waterfrom thesetortuous or 4contorted water walls. The flooding of the crown sheetinsures the safety thereof in the event of low water in the boiler. l

The oppositely or reversely disposed members or walls of each i'ireb'oxserve as in the nature of a fire arch therein, and, as illusstrated inFig. 4, they may be supplemented by a number of arch brick l2. Thesebrick are vconveniently supported by the watercirculating members.Furthermore, the oppositely disposed contorted wallsadmirably serve thepurpose of directing lthe lfirebox flames energetically `against the`side and crown sheets of the irebox. s

A. distinct purpose 'in this invention and attained hereby resides inthe iiexibility of the twisted or contorted members through which theyare enabled to absorb all expansion and contraction stresses which mighttend to disrupt the same or the connections thereof to the crown andthroat sheets.l

Having thus described my invention, I claim :is new and. desire to'secure by Letters Patent:

1. A locomotive boiler and its contained irebon in ornbinati-on withpair of hollow stay-bolted water walls applied to the lirebox, saidwalls being oppositely twisted and each thereof presenting ahorizontallyY e'loni-v gated intake opening at the front leg of thelirebox and a like outletVV openingl iongitndinally elongated in thecrown sheet of the ir'ebx.

2L locomotive boiler and its contained irebox in coi'nbination with apair of hollow stay-bolted water walls applied to the lirep box, saidwalls being oppositely twisted and 20 din'xlly elongated in the crownAsheet of the each thereof presenting a horizontally elongritedintakeopening at the' front leg of the fi'rebox and a like outletopening longituezroh thereof presenting a horizontally elongated intakeopening at the front leg of the ireb'ox and a like outlet openinglongitudinelluv elongated in the Crown sheet of the irebox, the lowerportions of said walls oo'ii'stitnting n partial arch in the lower frontpart of the lirebox, and lirebriel; appliedto said walls and therewithcompleting u fire arch in the lower forward part of seid firebox.

ln testimony whereof, l have hereunto set my hand this 6th day of May,1922.

CHARLES GILEERT HAVLEY.

